Olympic (Korean Giant) Asian Pear
Pollination & Compatibility Guide
Olympic (Korean Giant) Asian pear pollination guide: Bloom Group 1 phenology, large fruit sizing, cold hardiness, and long storage.
Olympic (Korean Giant) is an Asian Pear (Needs Early Bloom Partner)
An Asian pear. Blooms 7–14 days ahead of European pears on the same site — partner it with another Asian pear (Shinko, Nijisseiki) as the primary donor; a European pear is at best supplementary and should never be the only one in the block. Not suitable for quince rootstock; use P. betulifolia or P. calleryana. Olympic (Korean Giant) needs at least one compatible pollinizer from bloom group 0–2 to set a reliable crop.
- Chromosome Ploidy
- Diploid (2n)
- Required Companions
- 1 Diploid Partner
- Bloom Group
- Group 1 (Early-Spring)
- Harvest Timing
- Late (+14d from Conference)
Flowering Period & Overlap Window
Pear flowering periods are compressed into numbered bloom groups (1 through 4). Cross-pollination requires overlapping blossom timing between genetically compatible cultivars, with Asian pears flowering 7–14 days ahead of mid-season European varieties.
Any compatible diploid pear flowering within Group 1 to 2 provides matching blossom overlap.
Compatible Pollination Partners (7)
| Cultivar | Bloom Group | Overlap Type | Harvest | Primary Uses | Interactive Test |
|---|---|---|---|---|---|
| Group 1 | Full Overlap | Mid ±7d delta | Fresh Eating | Test Cross | |
| Group 1 | Full Overlap | Mid ±21d delta | Fresh Eating | Test Cross | |
| Group 2 | Full Overlap | Mid ±21d delta | Fresh Eating, Pickling | Test Cross | |
| Group 2 | Full Overlap | Mid ±28d delta | Fresh Eating, Canning | Test Cross | |
| Group 2 | Full Overlap | Early ±34d delta | Canning, Jelly | Test Cross | |
| Group 2 | Full Overlap | Early ±35d delta | Fresh Eating, Canning | Test Cross | |
| Group 2 | Full Overlap | Early ±39d delta | Fresh Eating | Test Cross |
Incompatible Varieties & Exclusions (1)
These pear varieties overlap in flowering time with Olympic (Korean Giant) but cannot fertilise it due to non-viable pollen (male-sterile diploids), direct parentage exclusions, or shared incompatibility alleles.
Luscious produces no viable pollen, so it cannot serve as a pollinizer.
Pomological Assessment: Late Harvest, Extreme Fruit Size & Blossom Management
Olympic, also widely marketed as Korean Giant, is a premier late-ripening Asian pear renowned for its immense fruit size. Individual fruits regularly exceed 450–600 grams under good cultural management. The skin is a warm golden-brown russet, enclosing firm, crisp, intensely juicy flesh with high sugar content and a rich, mild melon-like sweetness.
Despite its late autumn harvest maturity, Olympic blooms early (Bloom Group 1), characteristic of Pyrus pyrifolia. It requires cross-pollination with companion Asian pears blooming in the same early window, such as Shinko or Nijisseiki. Because the tree flowers profusely, aggressive early thinning is essential: fruitlets must be spaced to one per spur to allow branches to support the substantial weight of mature fruit without limb breakage.
Trees are vigorous with strong, upright scaffolding that can accommodate heavy fruit loads. Olympic displays better winter cold tolerance than most Japanese varieties, performing reliably across USDA Zones 5–9. Because of its extraordinary size and shelf life, Olympic is widely marketed as a premier winter specialty fruit across specialty grocery and direct-market channels.
Key Orchard Considerations for Olympic (Korean Giant)
Grafts strongly to Pyrus betulaefolia rootstock, providing the vigour needed to size very large fruit. Incompatible directly with Quince A/C. Sturdy branch framework requires central-leader or modified central-leader training.
Exhibits solid field resistance to fire blight and excellent winter cold hardiness compared to tender Asian cultivars, tolerating winter temperatures down to -30°C without wood injury.
Late harvest, typically mid-to-late October. Unrivalled storage capability among Asian pears, maintaining crispness and sugar profile for five to six months in cold storage at 0°C.
Take Olympic (Korean Giant) from Planning to Planting
Use Kropigo's free browser tools to model your block density, tree counts, and pollinizer rows, then maintain permanent orchard records row by row.
Pollination Checker
Check Olympic (Korean Giant) against supported cultivars with compatible flowering and pollination data.
Commercial Block Planner
Calculate high-density tree spacing, row geometry, and establishment costs.
Block Record Keeping
Track pruning, chemical thinning, and harvest tallies block by block from the orchard.